Edit - Is this related to your other question here? https://support.mozilla.org/en-US/questions/1004226

Which extension did you install to "restore" the Add-on Bar to Firefox 29?

The add-on bar was removed by Mozilla for reasons no one understands.

Go to the Mozilla Add-ons Web Page {web link} (There’s a lot of good stuff here) and search for an add-on bar.

Many of us are using Classic Theme Restorer (Customize Australis) {web link} Restore squared tabs, appmenu, add-ons bar, small button view and more on Australis UI (Windows/MacOSX/Linux + Fx 29+).

@the-edmeister: I haven't installed any extension to restore add-ons bar. This was started to disappear exactly after I've updated Firefox to latest version.

No, this is not linked with the other post. This problem started before installing any plugin to edit Addons bar.

@FredMcD: Dude, Addons bar is not removed, it is just hidden everytime when firefox starts.

Firefox 29 no longer supports the Add-on Bar, so you must be using an extension that re-adds this toolbar.

This extension may not work properly if you need to re-enable the Add-on Bar on each start of Firefox and you can try to use another extension that restores the Add-on Bar instead like the already mentioned Classic Theme Restorer extension.

• https://support.mozilla.org/kb/what-happened-to-the-add-on-bar

Do the extensions that restore the Add-on bar also re-create the Ctrl+/ keyboard shortcut? If so, that might be the fastest workaround for the time being.

Ok, I've understood now. I've used Classic Theme Restorer extension and it solved my problem.